Nut-lock.



.ZWAWLE QOPY.

C. G. YOUNG.

NUT LOCK.

APPLICATION FILED FEB.25, 1911.

Patented Aug. 12, 1913.

nnirnn STATES PATENT OFFICE.

CHAMP o. YOUNG, or ivrecLosKY, inLINoI's, ASSIGNOR or ONE-THIRD To JOHNF. CHAPPELL AND ONE-THIRD T0 HENRY H. Mc'c'nUsKY, or McoLUsKY, ILLINOIS.

NUT-LOCK.

Specification of Letters Patent.

Patented Aug. 12,1913.

Application filed February 25,- 1911. Serial No. 610,903.

To all whom it may concern:

Be it known that I, CHAMP O. YOUNG, citizen of the United States,residing at McClusky, in the county of Jersey and State of Illinois,have invented certain new and useful Improvements in Nut-Locks, of whichthe following is a specification.

This invention relates to an improvement in nut locks, and has for anobject to provide a simple device for interlocking the nut upon the boltwithout weakening the same, and to provide a structure which can bereadily interlocked and released, as required.

The invention further contemplates a nut lock wherein a slightdepression is formed in one side and longitudinally of the bolt, and inwhich the nut is provided with undercut or dovetail recesses of slightdepth in its outer face to receive therein a cor're spondingly shapedkey having a projection for snug engagement in a. longitudinal grooveformed in the side of the bolt.

For a full understanding of the invention and the merits thereof andalso to acquire a knowledge of the details of construction, reference isto be had to the following description and accompanying drawings, inwhich:

Figure 1 is a side elevation of the assembled nut lock; Fig. 2 is alongitudinal central section taken through the same; Fig. 3 is anenlarged perspective view of the nut lock having the parts thereofremoved from the bolt; and, Fig. 1 is a detail enlarged perspective viewof the key employed.

Corresponding and like parts are referred to in the followingdescription and indicated in all the views of the drawing by the samereference characters.

Referring to the drawing the numeral 10 designates a bolt, the samehaving a threaded portion 11 and a head 12. One side of the bolt 10 isprovided with a longitudinal groove or channel 13 interrupting thethreaded portion 11 and extending to the extremity of the bolt. A nut 14is disposed over the threaded portion 11 of the bolt, the nut beingprovided with oppositely disposed and radially extending dovetail slots15 terminating in the sides of the nut 14. The slots 15 open at theirinner ends into the centrally threaded opening of the nut and areadapted to alternately register with the groove 13 in the bolt. A key 16of dovetail form is fitted in one of the slots 15, the same bindingtightly therein to pre vent its displacement. The inner end of the keyis provided with a projection 17 of angular cross section to fit withinthe longitudinal groove 13 of the bolt.

From Fig. 2 it will be noted that the key 16 is of a lengthcorresponding to the length of the slot 15, and that the projection 17is of a length equal to the depth of the groove 13. This arrangementprovides a nut lock in which there are no extensions or the like beyondthe walls of the nut or about the bolt. The inner end of the key 16,forming the projection 17, is formed angular in cross section for thepurpose of snugly engaging against the opposite flattened Wall of thegroove 13 while the edges of the key are inclined so as to engagebeneath the undercut sides of the dovetail slots 15. It is of courseunderstood that the bolt 10 may be elongated and form a truss rod, astay-bolt or any other member employed in binding objects together.

In the use of the nut lock it is only necessary to rotate the nut uponthe bolt to the desired position, or approximately so, as the nut isprovided with two of the dovetail slots 15 which register alternatelywith the groove 13 of the bolt upon each half revolution of the nut. Inthis manner it is only necessary to provide one groove in the bolt, theweakest member of the lock, and

wherein the groove need only be slight. The nut is provided with the twoslots which are of slight depth and which do not materially decrease thestrength of the nut as they need only interrupt one convolution of theinterior thread of the nut. The end of the projection 17 is beveled, asat 18, to present a foreshortened upper face to the key 1 6 admitting ofthe insertion of a sharp instrument between the same and the inner wallof the depression 13 to force the key 16 from the nut 14. A furtheradvantage obtained by beveling the projection 17 of the key is that itprovides a cutting edge adapted to bite the threads of the bolt in casethe nut cannot be conveniently turned to bring its slot in registrationwith the slot of the bolt. Furthermore, this permits the use of the nutupon unslotted bolts if desired, while it may be employed upon slot tedbolts either by seating it in the slot of the bolt or by engaging itwith the threads thereof. If deemed necessary, two keys may be employed,one seating in the slot and the other engaging the threads of the nut.When the bolt is in use in such a place that the nut will oftentimeshave to be removed, the key is preferably seated in the slot, While onthe other hand, if the nut and bolt are to remain permanently in place,the key will preferably be inserted through the opposite end of the nutslot to bite the threads of the bolt and form a permanent look.

It will be observed from Figs. 1 and 2 that the key 16 is relativelyflat to dispose its upper face below the face of the nut 14:, and thatthe marginal upper edges 19 of the slots 15 are flanged inwardly overthe key 16 to bind the same in position.

Having thus described the invention, What is claimed is:

The combination With a bolt having a groove extending longitudinallytherein at its threaded end, of a nut having a diametrically disposedslot in its outer face, the side Walls of which diverge inwardly, and akey having beveled sides corresponding to the beveled Walls of the slotand reduced at its inner end to engage in the groove of the bolt, theinner end of said reduced terminal of the key being knife edgedtransversely for biting engagement With the threads of the bolt if thenut cannot be turned to bring its slot in registration With the slot ofthe bolt.

In testimony whereof I aflix my signature in presence of two Witnesses.

CHAMP C. YOUNG. [L. s] l Vitnesses FRANK E. STELLE, l/VILLIAM PATTON.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

